feat: add refresh token messages and RPC method

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@lendry-erp/contracts",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "Protobuf definitions and generated TypeScript types",
   "type": "commonjs",
   "main": "./dist/index.js",

proto/identity.proto

@@ -6,6 +6,7 @@ import "google/rpc/status.proto";
 
 service AuthService {
     rpc Login (LoginRequest) returns (LoginResponse);
+    rpc Refresh (RefreshRequest) returns (RefreshResponse);
     rpc Register (RegisterRequest) returns (RegisterResponse);
     rpc Verify2Fa (Verify2FaRequest) returns (Verify2FaResponse);
 }
@@ -37,6 +38,15 @@ message LoginResponse {
   google.rpc.Status error = 8;
 }
 
+message RefreshRequest {
+  string refresh_token = 1;
+}
+
+message RefreshResponse {
+  string access_token = 1;
+  string refresh_token = 2;
+}
+
 message RegisterRequest {
   string username = 1;
   string password = 2;